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Re: [Discuss-gnuradio] Delta 44
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Delta 44 |
Date: |
Fri, 27 May 2005 03:46:42 -0700 |
User-agent: |
Mutt/1.5.6i |
On Fri, May 27, 2005 at 05:48:18AM -0600, Bob McGwier N4HY wrote:
> Even though the Delta 44 has only four inputs and four outputs (all
> balanced monoaural), it reports twelve through ALSA to jack. I can
> tell this is happening since dial_tone.py and tvrx_wfm_rcv.py both
> blow up with complaints about the number of sinks. multi_tone.py
> works perfectly since it loads stuff up for all gazoutas.
>
> Has anyone done a general work around for this?
Try using plughw:0,0 instead of hw:0,0 as the pcm device (second arg
to audio.source and audio.sink. plughw:0,0 should send something (not
sure what) to all i/os. Not sure of the performance impact. A bit of
measuring with oprofile will reveal all.
It sounds like a fix for the Delta-44 ALSA driver is in order too.
This assumes that the driver can tell the difference between a
Delta-44 and other boards with the same chip set.
You might want to post this question to the JACK or ALSA mailing lists.
Eric
- [Discuss-gnuradio] USRP DDC usage, Philip Balister, 2005/05/25
- Re: [Discuss-gnuradio] USRP DDC usage, Achilleas Anastasopoulos, 2005/05/26
- Re: [Discuss-gnuradio] USRP DDC usage, Achilleas Anastasopoulos, 2005/05/26
- Re: [Discuss-gnuradio] USRP DDC usage, Krzysztof Kamieniecki, 2005/05/26
- Re: [Discuss-gnuradio] USRP DDC usage, Eric Blossom, 2005/05/26
- [Discuss-gnuradio] Delta 44, Bob McGwier N4HY, 2005/05/26
- Re: [Discuss-gnuradio] Delta 44,
Eric Blossom <=
- Re: [Discuss-gnuradio] Delta 44, n4hy, 2005/05/27
- Re: [Discuss-gnuradio] Delta 44, Matt Ettus, 2005/05/27
- Re: [Discuss-gnuradio] Delta 44, n4hy, 2005/05/27
- Re: [Discuss-gnuradio] Delta 44, James Cooley, 2005/05/27
- Re: [Discuss-gnuradio] Delta 44, Eric Blossom, 2005/05/28
Re: [Discuss-gnuradio] USRP DDC usage, Krzysztof Kamieniecki, 2005/05/26
Re: [Discuss-gnuradio] USRP DDC usage, Matt Ettus, 2005/05/26